#include <stdio.h>
main()
{
	int day,month,year,sum,leap;
	printf("\n Pls input year,month,day:\n");
	scanf("%d,%d,%d",&year,&month,&day);
	switch(month) /*calculate the days before input month */
	{
		case 1:sum=0;break;
		case 2:sum=31;break;
		case 3:sum=59;break;
		case 4:sum=90;break;
		case 5:sum=120;break;
		case 6:sum=151;break;
		case 7:sum=181;break;
		case 8:sum=212;break;
		case 9:sum=243;break;
		case 10:sum=273;break;
		case 11:sum=304;break;
		case 12:sum=334;break;
		default:printf("data error");break;
	}
	sum=sum+day;
	if(year%400==0||(year%4==0&&year%100!=0)) /*judge if leap year*/
			{leap=1;}
			else
			{leap=0;}
	if(leap=1&&month>2)
	{sum++;}
	printf("It is the %dth day.\n",sum);
			}
